Buggy code:
public class ProjectHelper { private static SAXParserFactory parserFactory = null ; private Parser parser ; private Project project ; private File buildFile ; private Locator locator ; public static void configureProject ( Project project , File buildFile ) throws BuildException { } private ProjectHelper ( Project project , File buildFile ) { } private void parse ( ) throws BuildException { try { SAXParser saxParser = ProjectHelper . getParserFactory ( ) . newSAXParser ( ) ; parser = saxParser . getParser ( ) ; saxParser . parse ( buildFile , new ProjectHelper . RootHandler ( ) ) ; } catch ( ParserConfigurationException exc ) { throw new BuildException ( "Parser<seq2seq4repair_space>has<seq2seq4repair_space>not<seq2seq4repair_space>been<seq2seq4repair_space>configured<seq2seq4repair_space>correctly" , exc ) ; } catch ( SAXParseException exc ) { Location location = new Location ( buildFile . toString ( ) , exc . getLineNumber ( ) , exc . getColumnNumber ( ) ) ; Throwable t = exc . getException ( ) ; if ( t instanceof BuildException ) { BuildException be = ( ( BuildException ) ( t ) ) ; if ( ( be . getLocation ( ) ) == ( Location . UNKNOWN_LOCATION ) ) { be . setLocation ( location ) ; } throw be ; } throw new BuildException ( exc . getMessage ( ) , t , location ) ; } catch ( SAXException exc ) { Throwable t = exc . getException ( ) ; if ( t instanceof BuildException ) { throw ( ( BuildException ) ( t ) ) ; } throw new BuildException ( exc . getMessage ( ) , t ) ; } catch ( FileNotFoundException exc ) { <START_BUG> throw new BuildException ( ( ( "File<seq2seq4repair_space>\"" + ( buildFile . toString ( ) ) ) + "\"<seq2seq4repair_space>not<seq2seq4repair_space>found" ) ) ; <END_BUG> } catch ( IOException exc ) { throw new BuildException ( "Error<seq2seq4repair_space>reading<seq2seq4repair_space>project<seq2seq4repair_space>file" , exc ) ; } } private class AbstractHandler extends HandlerBase { protected DocumentHandler parentHandler ; public AbstractHandler ( DocumentHandler parentHandler ) { } public void startElement ( String tag , AttributeList attrs ) throws SAXParseException { } public void characters ( char [ ] buf , int start , int end ) throws SAXParseException { } public void endElement ( String name ) throws SAXException { } } private class RootHandler extends HandlerBase { public void startElement ( String tag , AttributeList attrs ) throws SAXParseException { } public void setDocumentLocator ( Locator locator ) { } } private class ProjectHandler extends ProjectHelper . AbstractHandler { public ProjectHandler ( DocumentHandler parentHandler ) { } public void init ( String tag , AttributeList attrs ) throws SAXParseException { } public void startElement ( String name , AttributeList attrs ) throws SAXParseException { } private void handleTaskdef ( String name , AttributeList attrs ) throws SAXParseException { } private void handleProperty ( String name , AttributeList attrs ) throws SAXParseException { } private void handleTarget ( String tag , AttributeList attrs ) throws SAXParseException { } private void handleDataType ( String name , AttributeList attrs ) throws SAXParseException { } } private class TargetHandler extends ProjectHelper . AbstractHandler { private Target target ; public TargetHandler ( DocumentHandler parentHandler ) { } public void init ( String tag , AttributeList attrs ) throws SAXParseException { } public void startElement ( String name , AttributeList attrs ) throws SAXParseException { } } private class TaskHandler extends ProjectHelper . AbstractHandler { private Target target ; private Task task ; private RuntimeConfigurable wrapper = null ; public TaskHandler ( DocumentHandler parentHandler , Target target ) { } public void init ( String tag , AttributeList attrs ) throws SAXParseException { } public void characters ( char [ ] buf , int start , int end ) throws SAXParseException { } public void startElement ( String name , AttributeList attrs ) throws SAXParseException { } } private class NestedElementHandler extends ProjectHelper . AbstractHandler { private Object target ; private Object child ; private RuntimeConfigurable parentWrapper ; private RuntimeConfigurable childWrapper = null ; public NestedElementHandler ( DocumentHandler parentHandler , Object target , RuntimeConfigurable parentWrapper ) { } public void init ( String propType , AttributeList attrs ) throws SAXParseException { } public void characters ( char [ ] buf , int start , int end ) throws SAXParseException { } public void startElement ( String name , AttributeList attrs ) throws SAXParseException { } } private class DataTypeHandler extends ProjectHelper . AbstractHandler { private Object element ; public DataTypeHandler ( DocumentHandler parentHandler ) { } public void init ( String propType , AttributeList attrs ) throws SAXParseException { } public void characters ( char [ ] buf , int start , int end ) throws SAXParseException { } public void startElement ( String name , AttributeList attrs ) throws SAXParseException { } } public static void configure ( Object target , AttributeList attrs , Project project ) throws BuildException { } public static void addText ( Object target , char [ ] buf , int start , int end ) throws BuildException { } public static void addText ( Object target , String text ) throws BuildException { } public static String replaceProperties ( String value , Hashtable keys ) throws BuildException { } private static SAXParserFactory getParserFactory ( ) { } private void configureId ( Object target , AttributeList attr ) { } }

Fix:
throw new BuildException ( exc ) ;